Is measurement-based feedback still better for quantum control systems?

doi:10.1016/j.sysconle.2010.03.008

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	Is measurement-based feedback still better for quantum control systems?
	Qi, Bo; Guo, Lei
	2010-06-01
发表期刊	SYSTEMS & CONTROL LETTERS
ISSN	0167-6911
卷号	59 期号:6 页码:333-339
摘要	In this paper, we put forward a fundamental question concerning feedback control of quantum systems: Is measurement-based feedback control still better than open-loop control? In contrast to the classical control theory, the answer is far from obvious. This is because measurement-based feedback needs measurement to reduce the system uncertainty, whereas the measurement on a quantum system will inevitably increase the system uncertainty in turn. In fact, there is a complicated tradeoff between the uncertainty introduced and the information gained by the measurement on a quantum system. To investigate this fundamental problem, we will only focus on a typical model of coherent control mode with and without the decoherence term in the paper. By establishing some fundamental limits on the performances of both the open-loop and measurement-based feedback controls, we will demonstrate via simulation that the measurement-based feedback control of quantum systems is still superior to the open-loop control in some sense for the typical model under consideration. (C) 2010 Elsevier B.V. All rights reserved.
关键词	Quantum feedback control Open-loop control Capability of control Stochastic master equation Measurement
DOI	10.1016/j.sysconle.2010.03.008
语种	英语
资助项目	National Natural Science Foundation of China[60821091] ; National Natural Science Foundation of China[60703083] ; CAS[KJCX3-SYW-S01]
WOS研究方向	Automation & Control Systems ; Operations Research & Management Science
WOS类目	Automation & Control Systems ; Operations Research & Management Science
WOS记录号	WOS:000280432900002
出版者	ELSEVIER SCIENCE BV
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/10540
专题	系统科学研究所国家数学与交叉科学中心
通讯作者	Qi, Bo
作者单位	Chinese Acad Sci, Key Lab Syst & Control, ISS, Acad Math & Syst Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Qi, Bo,Guo, Lei. Is measurement-based feedback still better for quantum control systems?[J]. SYSTEMS & CONTROL LETTERS,2010,59(6):333-339.
APA	Qi, Bo,&Guo, Lei.(2010).Is measurement-based feedback still better for quantum control systems?.SYSTEMS & CONTROL LETTERS,59(6),333-339.
MLA	Qi, Bo,et al."Is measurement-based feedback still better for quantum control systems?".SYSTEMS & CONTROL LETTERS 59.6(2010):333-339.